HTML5 was proposed in 2004 to extend HTML. Major browsers began implementing HTML5 between 2010-2011. Key features of HTML5 include new form input types like email and date, audio and video elements, and a simplified doctype of <!DOCTYPE html>. While many new features were added, some HTML and XHTML attributes were left out of the HTML5 specification.
5. 5
• 1991 – html tag – Tim Berners Lee
1994 – HTML 2 - já incluia tag <img>
1997 – HTML 3.2
1999 – HTML 4.01
2000 – XHTML 1.0
2001 – XHTML 1.1 – CSS
20... – Ian Hickson (Opera) propõe estender HTML:
Web Forms 2.0, Web Apps 1.0
2004 – Apple, Mozilla e Opera criam WHAT WG
(Web Hypertext Application Technology Working Group)
2007 – W3C retorna HTML Working Group
2009 – W3C descontinua XHTML
2010-2011 – Apple, Google, Microsoft, Mozilla e Opera
implementam HTML5
HTML 5 [HyperText Markup Language]
15. 15 HTML5 - Futuro da Web
Doctype:
HTML4
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
XHTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">